It’s this stupid thing where people grab a plastic solo cup and then bang it around while singing a song.

Not sure about you, but I use a solo cup for an entirely different thing. It’s called filling it up with the drink of your choice and then drinking out of it.

The first people I saw do the cup song were sisters Lennon & Maisy Stella. They covered “Call Your Girlfriend” by Robyn, which is great and has been viewed over 15 million times.

The sisters have talent without the cup song, but I think it helped them get noticed and they’re now on that show called Nashville.

Anyway, onto today’s Viral Video of the Day. I’ve got a couple sisters, so I know what it’s like to be a brother and deal with some pretty dumb stuff, at least for a guy. This little bro, however, isn’t messing around.

I like his zero tolerance rule for the cup song and can only imagine what else he doesn’t tolerate from his sis around the casa.

Can’t wait until tomorrow for another viral video from Surfer Stephen? Catch up on some of his old favorites below: